Half-groat, 1553, Vilnius mint
Sigismund II August (1544 - 1572)
Obverse: Seventh Eagle. There is no interpunctuation between "LI" and "SIGIS".
Lettering: SIGIS 
AVG REX PO MAG DVX LI
Reverse: Twelfth Knight.
Lettering: MONETA MAGNI DVCAT9 LITVA / 1553
Identification
Ivanauskas, E., Cesnulis, E. (2016). Lithuanian coins of Sigismund August 1545-1571. Kaunas: Author
number: 4SA247-16
Rarity: RR (Not more than 50 pieces)
Ivanauskas, E., Česnulis, E. (2014). Lithuanian half-groats of Sigismund August 1545-1566. Kaunas: Author
number: 4SA247-16
Rarity: RR (Not more than 50 pieces)
Ivanauskas, E. (2013). Coins and Bars of Lithuania 1236-2012 (Vol. 1). Kaunas: Author
number: 4SA247-16
Rarity: RR (Not more than 50 pieces)
Main data
Denomination: Half-groat
Value: 0.5
Currency: Groat
Year: 1553
Type: Regular
Minting
Mint: Vilnius
Minting type: hammered
Engraver: Martin Wartenberg
Parameters
Material: Silver
Fineness: 375
Diameter (mm): 19
Shape: Round
